Car roof



April 14, 1931- v. E. SISSON 1,800,363

CAR ROOF Filed July 25, 1927 2 Sheets-Sheet l Even i01- April 14, 1931.

V. E. SISSON CAR ROOF Filed Jilly 23, 1927 2 Sheets-Sheet 2 Z1 vent or Patent d A r. 14, 1931 UNIT D) "s AT s "PAT NT OFFICE? VINTON E. sIssoN, or CHICAGO, ILLINoIs, AssIGNonEro P. H. MURPHY coivrPANg or NEW KENSINGTON, PENNSYLVANIA, A CORPORATION OF PE NSYLVANIA I CAR Boon;

Application filed Ju1y 23,

This invention relatestorailway freight carroofs, and more particularly, to the all metal type of roof wherein relatively thick roof sheets span the distance between the opposite side walls of the car and are preferably secured thereto and are so formed as to not only act as a roof in protecting the lading from the weather'but also perform the functions of'the usual car-lines, ridge pole andpurlins which in the ordinarycar 1 constitute the roof framing.

An object of the invention is to provide such a metallic roof having a longitudinal section with substantially convex portions (forming arches or bridges) in one plane alternating with substantially concave portions (forming troughs or gutters) in a lower plane connected by substantially vertical web portions which arches and troughs extend uninterruptedly between the web portions, so as to tr'ansmitloads imposed upon them to the webs. V I

Another object is to produce a roof comprising alternate convex and concave portions in different planes connected by substantially vertical web portions and having the distance between the several web, por: tions and the thickness of the metal of the upper and lower portions so proportioned and dimensioned that the neutral axis of the section is midway between the bound ing planes of the section whereby the maximum strength of the steel roof is obtained.

Another object is to simplify the attachment of such a roof to the side walls of the car by gradually blending the respective convex and concave portions into straight portions adjacent the opposite side plates of the car'and furthermore so as to maintain the neutral axis midway between thebetween the opposite side walls of thezcar.

bounding planes of the roof of any cross section between the opposite side plates of the car.

Another object is to produce a strong and durable roof of simple construction which can be cheaply manufactured and easily assembled and which will permit the use of sheets of lighter gauge than those heretofore required for roofs of the all metal type, thereby reducing the weight and cost of the metallic roof is shown in Fig.4 wherein with each other. The convexity of the con- 5. straight portion6 adj'acent the; sideplate 1927'. Serial No. 207,923.

roof and at the same-time greatly increasing its strength. 1

In the-drawings? I F .1 Fig. 1' is a plan view-of a partof a car with my improved roof applied thereon.

Fig. 2 is anenlarged section. on line 22 of- Fig.1. .i Y Fig. 8 is an enlarged section on line 33 of Fig. 1. A I

Figs. 4'to 9 inclusive show the preferredcontour of the longitudinal section of the roofmade of .one or more metallic-sheets secured together atdifferent places."

Figs. :10 and 11 show modified forms. of the longitudinal contour. The roof sheets span the distance between the opposite side plates 2 and are preferably attached thereto in any convenient manner. Thepreferr'ed longitudinal contour of the the portions?) are arched .or apexed convexly (or upwardly) so astoformbridges to transmit any load imposed thereonlto the substantially vertical web portions 4 and the 'portions5 are depressed-or apexed concavely (or downwardly) to form. gutters which deflect the rain, cinders, etc., away fromithe web portion. The convex and concave portions are positioned alternately vex portions and the concavity of theconcave portions, respectively, extend uninter ruptedly between adjacent web portions;

The convex portion gradually merges into andalso the concave portion gradually' mergesinto a straight portion 7'adj acentf the side plate, which straight portions-arepref- 'erably secured to the side plate, but the web 4: preferably remains constant in width The running board saddles (8, 9, 10). may

be secured to any convenient part. of the, A

roof, as shown in Figs. 5, 6; and 8 respectively. I

Fig. 5 shows the'preferred construction wherein the convex roof'sheets 12 areprovided with depending flanges 13 at their Lop- I posite side margins and the concave ,roof

sheets 14 are provided with upstanding flanges. 15 at their opposite side margins and I the said depending flanges and upstanding V the upstanding flanges 20 of the concave vex portions 42 with adjacent margins of sheets 21 are provided with outwardly projecting flanges 22 which are secured to the marginal portions of the convex sheets 23.

F ig. 7 shows a construction wherein each roof sheet is provided with a convex and a concave portion (31) with an integral web 32 therebetween and with an upstand- "ing flange 38. at one side and a depending flange 34 at the other side of the roof sheet,

the adjacent flanges of adjacent roof sheets secured together to form the webportion.

Fig- 8 shows. a modification wherein each sheet-is provided with a concaveportion and two web portions 41 and two semi-conadjacent sheets secured together at 43. 1

Fig. 9 shows axconstruction wherein each sheet is provided with a webportion and asemi-concave portion 51 and semiconvex portion :52 and the adjacent margins of adjacent sheets secured'together at-53 and 54.

Fig. 10 is a longitudinal cross section of the roof similar to that shown in Fig. 4 with the convex-and concave portions each comprising two straight surfaces -6l angularly disposed to each other, while Fig. 11

shows a construction wherein the convex V and concave portions each compr1se;three straight portions 626364 angularly disposedto each other;

- In the description and claims I have used 7 the phrase convex portions and "concave portions;but it is understood that the construction shown in Figs. 10 andll or the the flanges thereon, the flanges of the convex sheets secured to the flanges of adjacent concave sheets. V

2. metallic car roof comprising substantially convex roof sheets forming an archbetween depending flanges at their opposite side margins, the convexity of said convex sheets extending uninterruptedly between the flanges thereon, said convex sheets alternately disposed between substantially concave roof sheets forming a trough between upstanding flanges at their opposite side margins, the concavity of said concave sheets extending uninterruptedly between the flangesthereon, the flanges of the'convex sheets overlapping and secured to the flanges ofadjacent concave sheets.

j VINTON E. SISSONJ like come within the meaning of this phrase and the scope of the invention.

The convex portions 3 and the concave portions 5 are each preferably wider than V the distance between parallel planes 71- 7 2' bounding the outermost portions of the w The accompanying drawings illustrate the preferred form of the invention, though it is to be understood that the invention is not limited to the exact details of construction shown and described, as it is obvious that various modifications thereof within the scope of theclaims will occur 'to persons skilled in the art.

1 claim: V

l. A metallic car roof comprising substantially convex roof sheets forming an arch between depending flanges at their opposite side margins, the convexity of said convex sheets extending uninterruptedly between the flanges thereon, said convex sheets alternately disposedbetween substan- 

